Transformer capable of improving wiring strength

Abstract

The utility model discloses a transformer capable of improving wiring strength, which comprises a framework, a coil wound on the framework, a magnetic core piece mounted on the framework and pins arranged on the framework and connected with the coil. The first terminal part and the second terminal part are formed at the two ends of the sleeve and used for installing the binding post, a coil is wound on the sleeve, a lead of the coil extends out of the two ends of the sleeve and is wound on the binding post, and a spiral groove used for facilitating winding and welding of the lead is formed in the binding post. By arranging the spiral groove on the binding post, not only can the fixation of the lead be facilitated and the connection stability be improved, but also the strength of the connection between the binding post and the first terminal part and the second terminal part can be improved through the spiral groove on the binding post, and the situation that the binding post is integrally formed through injection molding, clamped connection or threaded connection is avoided.

Description

Technical field:

[0001] The utility model relates to the technical field of transformers, in particular to a transformer with improved connection strength. Background technology:

[0002] A transformer is an electrical device that converts one voltage to another voltage through the principle of electromagnetic induction. It is widely used in electronic equipment, lighting systems, communication equipment, and household appliances. Its basic structure includes two or more windings and a magnetic core. The windings are usually divided into primary windings and secondary windings. When an alternating current passes through the primary winding, the alternating magnetic field generated forms an alternating magnetic flux in the core, which induces an electromotive force in the secondary winding, thereby realizing voltage conversion. The voltage change of the transformer is proportional to the turns ratio of the primary and secondary windings, that is, by adjusting the turns ratio, high-voltage alternating current can be converted into low-voltage direct current, or low-voltage electricity can be converted into high-voltage electricity. The functions of small transformers are not limited to voltage conversion, but also include power transmission and signal coupling to ensure the stable operation of various electronic equipment and systems. Its compact structure, high efficiency, and strong reliability make it an indispensable core component in modern electrical and electronic applications.

[0003] The utility model patent with Chinese patent application number 201921882360.3 discloses a transformer structure, which is the same as the traditional transformers on the market, including a shell 1, an iron core 2, a terminal seat 3, a terminal post 4, etc. However, in the scheme disclosed in the patent, since the shell 1 and the terminal seat 3 are separated, and the terminal seat 3 is fixed to the terminal post 4 by a fixed block and a movable block 7, although this method can make the terminal post 4 installed more firmly, it also increases the complexity of the structure, which not only increases the cost but also reduces the installation efficiency.

[0004] In view of this, the inventor proposes the following technical solution. Utility model content:

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a transformer with improved connection strength.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a transformer with improved wiring strength, comprising: a skeleton, a coil wound on the skeleton, a magnetic core installed on the skeleton, and pins arranged on the skeleton and connected to the coil, characterized in that: the skeleton includes a sleeve and a first terminal part and a second terminal part formed at both ends of the sleeve and used to install a terminal post, wherein a coil is wound and installed on the sleeve, the lead wires of the coil extend out from both ends of the sleeve and are wound on the terminal post, and the terminal post is provided with a spiral groove for facilitating lead winding and welding.

[0007] Furthermore, in the above technical solution, the terminal is arranged on the first partition plate and the second partition plate along the radial distribution of the sleeve.

[0008] Furthermore, in the above technical solution, the first partition plate and the second partition plate are respectively provided with a first mounting hole and a second mounting hole for mounting the terminal.

[0009] Furthermore, in the above technical solution, the terminal is fixed to the first partition and the second partition by integral injection molding.

[0010] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model adopts the arrangement of spiral grooves on the terminal, which not only facilitates the fixation of the lead wire and improves the stability of the connection, but also the spiral grooves on the terminal can improve the strength of the connection between the terminal and the first terminal part and the second terminal part, regardless of whether the terminal is formed by one-piece injection molding, or connected by a clamping connection, or connected by a thread. Secondly, the coil is wound on the skeleton, and the core shaft part of the magnetic core is inserted into the center of the coil to meet the electromagnetic induction structure. At this time, the coil is not directly wound on the core shaft part, but is wound on the skeleton, which not only achieves the purpose of insulation, but also greatly improves the heat dissipation effect. Moreover, this structure is mechanically stable and can ensure a long service life. Description of the drawings:

[0011] Figure 1 It is a reference diagram of the use state of the utility model;

[0012] Figure 2 It is an exploded diagram of the utility model in use state;

[0013] Figure 3 This is an assembly structure diagram of the utility model in use state;

[0014] Figure 4 It is a three-dimensional diagram of the elastic bayonet in the utility model;

[0015] Figure 5 It is a three-dimensional diagram of the skeleton in the utility model;

[0016] Figure 6 It is a three-dimensional diagram of the magnetic core member in the utility model;

[0017] Figure 7 It is a three-dimensional diagram of the terminal in the utility model;

[0018] Figure 8 It is a cross-sectional view of the skeleton in the utility model. Specific implementation method:

[0019] The utility model is further described below in conjunction with specific embodiments and drawings.

[0020] See Figures 1 to 8 As shown, a transformer for improving the connection strength includes a frame 1, a coil 2 wound on the frame 1, a magnetic core 3 installed on the frame 1, and a pin 4 arranged on the frame 1 and connected to the coil 2. The frame 1 includes a sleeve 11 and a first terminal portion 12 and a second terminal portion 13 formed at both ends of the sleeve 11 and used to install a terminal 4, wherein the coil 2 is wound and installed on the sleeve 11, and the lead wire 21 of the coil 2 extends from both ends of the sleeve 11 and is wound on the terminal 4, and the terminal 4 is provided with a spiral groove 41 for facilitating the winding and welding of the lead wire 21. The spiral groove 41 is provided on the terminal 4, which not only facilitates the fixation of the lead wire 21 and improves the stability of the connection, but also the spiral groove 41 on the terminal 4 can improve the strength of the connection between the terminal 4 and the first terminal portion 12 and the second terminal portion 13. It is not theoretical that the terminal 4 is formed by integral injection molding, or is connected by a clamping position, or is connected by a thread. Secondly, the coil 2 is wound on the frame 1, and the core shaft portion 31 of the magnetic core member 3 is inserted into the center of the coil 2 to satisfy the electromagnetic induction structure. At this time, the coil 2 is not directly wound on the core shaft portion 31, but is wound on the frame 1, which not only achieves the insulation purpose, but also greatly improves the heat dissipation effect. Moreover, this structure is mechanically stable and can ensure a long service life.

[0021] The first terminal portion 12 and the second terminal portion 13 are symmetrically located at two ends of one side of the sleeve 11, and the end of the sleeve 11 is provided with a first connecting block 14 and a second connecting block 15 protruding outward and used to support the first terminal portion 12 and the second terminal portion 13; the other side of the sleeve 11 is provided with a third terminal portion 16 and a fourth terminal portion 17 symmetrical to the first connecting block 14 and the second connecting block 15.

[0022] The magnetic core member 3 includes a frame 33 that can be buckled on the outside of the frame 1, a core shaft portion 31 arranged at the center of the frame 33 and capable of being inserted into the sleeve 11, and a first positioning plate 34 and a second positioning plate 35 arranged on the inner wall of the frame 33 and used to support the core shaft portion 31, and the first positioning plate 34 and the second positioning plate 34 can be docked and clamped between the first connection block 14 and the third terminal portion 16 or between the second connection block 15 and the fourth terminal portion 17. The first positioning plate 34 and the second positioning plate 35 are symmetrically located at one end of the inner wall of the frame 33 to support the core shaft portion 31, and a positioning cavity 30 for docking with the frame 1 and accommodating the coil 2 is formed between the core shaft portion 31 and the inner wall of the frame 33.

[0023] An outer circumferential contact surface A of the core shaft portion 31 is reserved between the first positioning plate 34 and the second positioning plate 35, and the ends of the first connecting block 14, the second connecting block 15, the third terminal portion 16 and the fourth terminal portion 17 are all provided with arc-shaped groove surfaces B for docking and positioning with the outer circumferential contact surface A. By providing the arc-shaped groove surfaces B at the ends of the first connecting block 14, the second connecting block 15, the third terminal portion 16 and the fourth terminal portion 17, the magnetic core member 3 can be quickly positioned when it is buckled onto the frame 1, and the installation direction of the magnetic core member 3 is ensured to be accurate.

[0024] The first and second positioning contour surfaces B1 and B2 extending toward the outer edge of the sleeve 11 are provided on both sides of the arc-shaped groove surface B of the first connection block 14, the second connection block 15, the third terminal portion 16, and the fourth terminal portion 17, and the first and second positioning contour surfaces B1 and B2 are in contact with and pressed against at least one of the side walls of the first and second positioning plates 34 and 35 for positioning. The first and second positioning contour surfaces B1 and B2 of the arc-shaped groove surface B are in contact with and pressed against the side walls of the first and second positioning plates 34 and 35 to ensure that the magnetic core member 3 will not be offset or shaken after being installed on the frame 1, and to ensure that the magnetic core member 3 will not be displaced due to impact during subsequent use, thereby greatly improving the stability and life of the transformer.

[0025] The first terminal portion 12 and the second terminal portion 13 are respectively provided with a plurality of first wire grooves 121 and second wire grooves 131 for positioning and guiding the lead wires 21, and the terminal 4 is provided on the first partition 122 on both sides of the first wire groove 121, and on the second partition 132 on both sides of the second wire groove 131. The terminal 4 is provided on the first partition 122 and the second partition 132 along the radial distribution of the sleeve 11. The first partition 122 and the second partition 132 are respectively provided with first mounting holes 123 and second mounting holes 133 for mounting the terminal 4. The terminal 4 is fixed to the first partition 122 and the second partition 132 by integral injection molding.

[0026] In one embodiment, two magnetic core pieces 3 are provided and symmetrically buckled and installed on the frame 1, and the two magnetic core pieces 3 are fixedly connected by a plurality of elastic bayonet pins 5. The use of the elastic bayonet pins 5 to buckle the two magnetic core pieces 3 together not only greatly improves the installation efficiency and makes the assembly simpler and more portable, but also eliminates the need for welding and improves the assembly stability.

[0027] The elastic bayonet 5 includes a central axis 51 and a first elastic arm 52 and a second elastic arm 53 provided at both ends of the central axis 51 and capable of being elastically inserted into the magnetic core 3. At least one first locking hole 32 for inserting the first elastic arm 52 and the second elastic arm 53 is provided on the opposite end surfaces of the magnetic core 3. The elastic bayonet 5 is provided with a double-head locking structure, and the first elastic arm 52 and the second elastic arm 53 at both ends of the central axis 51 are respectively inserted into the first locking holes 32 of the two magnetic cores 3, so that the two magnetic cores 3 are assembled together.

[0028] Four first elastic arms 52 and second elastic arms 53 are respectively provided at both ends of the middle axis 51, and are symmetrically distributed in a matrix, so that they can be folded and inserted into the first clamping hole 32 after contacting the first clamping hole 32. By providing four first elastic arms 52 and second elastic arms 53 respectively and symmetrically distributed at both ends of the middle axis 51, two structures similar to explosive screws are formed at both ends of the elastic clamping pin 5. After the two ends of the elastic clamping pin 5 are respectively inserted into the first clamping holes 32 of the two magnetic core pieces 3, the first elastic arms 52 and the second elastic arms 53 will be elastically clamped with the inner wall of the first clamping hole 32, so that the two magnetic core pieces 33 can be symmetrically fastened together, and then tightly fixed on the frame 1. Of course, in order to increase the stability of the connection between the magnetic core component 3 and the elastic latch 5, a threaded groove or a latching groove can be added on the inner wall of the first latching hole 32 to increase the friction between the first elastic arm 52 and the second elastic arm 53 and the first latching hole 32, and a barbed latching structure can be formed under the elastic force of the first elastic force arm 52 and the second elastic force arm 53 to achieve a stable connection between the magnetic core component 3 and the elastic latch 5.

[0029] The middle parts of the first elastic arm 52 and the second elastic arm 53 protrude from the outer wall of the middle axis 51, and the ends of the first elastic arm 52 and the second elastic arm 53 are located inside the outer wall of the middle axis 51, so that the outer walls of the first elastic arm 52 and the second elastic arm 53 form a first transition cone 54 and a second transition cone 55 with an angle of 120°. A first gap 56 is formed between the four first elastic arms 52 for embracing each other and shrinking, and the first gap 56 is in a "cross" shape; a second gap 57 is formed between the four second elastic arms 53 for embracing each other and shrinking, and the second gap 57 is in a "cross" shape. The elastic bayonet 5 is made of plastic. In one embodiment, four elastic bayonet pins 5 are used to connect the two magnetic core pieces 3, and the four elastic bayonet pins 5 are located at the four corners of the magnetic core piece 3 to ensure the stability of the magnetic core piece 3 when docked and fastened.

[0030] In summary, in the present invention, the coil 2 bracket is wound on the sleeve 11 of the frame 1, and the first terminal part 12 and the second terminal 13 are set at both ends of the sleeve 11 to fix the terminal 4. After the coil 2 is wound, the lead 21 is wound on the terminal 4. The stability of the connection between the lead 21 and the terminal 4 is increased by setting a spiral groove 41 on the terminal 4, so that the lead 21 is positioned on the terminal 4, and after welding, the spiral groove 41 can greatly improve the tensile strength of the lead 21 to ensure the service life of the transformer. Secondly, two magnetic core pieces 3 are symmetrically buckled and installed on the frame 1, and the core shaft part 31 of the magnetic core piece 3 is inserted into the sleeve 11 to meet the magnetic induction requirements of the coil 2. The use of the plastic frame 1 can not only ensure effective insulation, but also improve the heat dissipation effect.

[0031] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A transformer with improved connection strength, comprising a frame (1), a coil (2) wound on the frame (1), a magnetic core (3) mounted on the frame (1), and pins (4) arranged on the frame (1) and connected to the coil (2), characterized in that: The frame (1) comprises a sleeve (11) and a first terminal portion (12) and a second terminal portion (13) formed at both ends of the sleeve (11) and used to mount a terminal post (4), wherein a coil (2) is wound and mounted on the sleeve (11), a lead wire (21) of the coil (2) extends from both ends of the sleeve (11) and is wound around the terminal post (4), and a spiral groove (41) is provided on the terminal post (4) for facilitating the winding and welding of the lead wire (21).

2. A transformer for improving connection strength according to claim 1, characterized in that: The terminal posts (4) are arranged on the first partition plate (122) and the second partition plate (132) in a radially distributed manner along the sleeve (11).

3. A transformer for improving connection strength according to claim 2, characterized in that: The first partition plate (122) and the second partition plate (132) are respectively provided with a first mounting hole (123) and a second mounting hole (133) for mounting a terminal post (4).

4. A transformer for improving connection strength according to claim 2, characterized in that: The terminal (4) is fixed to the first partition plate (122) and the second partition plate (132) by means of integral injection molding.

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